I know this is a fairly popular opinion, but Nintendo should put their games on PC. Literally every other company is doing it, and often, people in third world countries can't get the consoles until the lifespan is well over. Putting their games on steam, in SOME form, could boost accessibility a TON.
I'm in favor of them putting SOME of their games on PC. Just a mix of retro favorites and some old obscurities that would be hard to preserve otherwise.
I wouldn't see them putting Mario Kart 8, the Zelda Wild duology, or Xenoblade 2 and 3 on PC, but some of the oldies would be viable.
I'd actually argue the other two console makers releasing their games on PC is hurting their brand immensely.
I know that Xbox and PlayStation have turned (more) to the PC market due to flagging profits, but I don't see how that hurts the brand.
The consoles are still accessibly priced and easy to set up, while the PC offers more control and versatility.
Cuts to consoles and cheaper entries via Greatest Hits editions make for nice memories, but they're often hallmarks of a Nintendo struggling in the market in some fashion.
They did that during the Wii era though.
As for the rest of your post, that's a major part of why I consider the current copyright system corrupt on the systemic level. But it's worsened by the whole entertainment sector only having inflation as the only method of devaluation (the technical accounting term for what is commonly called "depreciation"). And it's horribly ineffective because it leaves the corporate copyright owners free reign to inflate anything produced from an IP if it's still valuable.
The entire entertainment industry needs harder, legally enforced devaluation on any of their products. It's only then when we'll see this period of stagnation across industries end.